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Service bulletins for the 2005 Audi A4

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

334 on file from NHTSA, as of 2026-10-19.

About P0300 on the 2005 Audi A4: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: P0300 are shown. Show all

Bulletins, newest first
A011309 2014753-2017-11-17. Service bulletin. ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE. Supersedes Technical Service Bulletin Group 00 number 10-01 dated February 5, 2010. Excessive accumulation of deposits on intake valves, intake manifold, fuel injectors and combustion chambers. Engine runs rough after cold start. Excessive engine cranking time. Hesitations while driving. Rough engine idle. Reduced engine performance. Poor fuel economy. Conditions may be severe enough to illuminate the MIL in conjunction with storage of DTCs for misfire (example: P0300, P030x) and / or lean fuel system (example: P0171, P0174, P1128, P1130, P1136, P1138) in the engine control module (ECM). Condition may be caused by use of contaminated gasoline. Condition may be caused by use of gasoline with a low content of deposit control additives.
TSB-20-10-102011-03-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: ONE OR MORE OF THE FOLLOWING DTCS ARE STORED WITHIN FIRST 60 SECONDS, WHEN COOLANT TEMPERATURE IS BETWEEN 10-39%C ACCORDING TO FREEZE FRAME DATA: DTC P0300 (RANDOM/MULTIPLE CYLINDER MISFIRE DETECTED); DTC P0301-P0306 (CYL. 1 MISFIRE DETECTED-CYL. 6 MISFIRE DETECTED). *PE
TSB-28-10-042010-11-05. Service bulletin. ELECTRICAL SYSTEM:IGNITION. AUDI: FOR INTERIM CLAIMS FOR 28F2/J1 VEHICLES CAMPAIGN ONLY. APPLICABLE VEHICLES MUST FALL WITHIN VIN RANGES NOTED. ENGINES 2.8L ARE NOT AFFECTED IN THIS SCOPE. COILS OF SCREW DOWN DESIGN (NON PENCIL TYPE) ARE ALSO NOT AFFECTED. THE MIL IS FLASHING OR CONSTANTLY ILLUMINATED. DTCS FOR MISFIRE IN ONE OR MORE CYLINDERS ARE STORED IN THE ECM DATA MEMORY (P0300 TO 0312). *PE
TSB-28-09-052009-10-31. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. AUDI: MIL ON, ENGINE SPEED SENSOR SPACER NOT REQUIRED (DTC P0300, P0335, P0336, P0321, P0322). MULTIPLE MISFIRES DETECTED ON ONE OR MORE CYLINDERS; MALFUNCTION INDICATOR LIGHT (MIL) MAY BE ON OR FLASHING. *PE
28 08 042008-05-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. MIL ON, ENGINE SPEED SENSOR SPACER NOT REQUIRED (DTC P0300, P0335, P0336, P0321, P0322). *NJ
05072005-12-22. Service bulletin. ENGINE AND ENGINE COOLING. SPORADICALLY AFTER COLD START, ENGINE MAY RUN SLIGHTLY ROUGH FOR A FEW SECONDS AND THE MALFUNCTION INDICATOR LAMP MAY ILLUMINATE WITH ONLY MISFIRE DIAGNOSTIC TROUBLE CODES (DTC) (P0300, P0301, P0302, P0303, P0304) STORED IN DTC MEMORY. *TT

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.